Year	Percent
1995-01-01	47.6591114925000
1996-01-01	46.8640565825000
1997-01-01	45.5174219775000
1998-01-01	45.1594251975000
1999-01-01	45.9306531600000
2000-01-01	46.6530290675000
2001-01-01	48.3574283575000
2002-01-01	49.1378784175000
2003-01-01	50.3947382875000
2004-01-01	51.5290299875000
2005-01-01	52.3983840200000
2006-01-01	54.8415330350000
2007-01-01	57.1563871100000
2008-01-01	58.4292181400000
2009-01-01	58.7815668350000
2010-01-01	59.8081856450000
2011-01-01	61.2546368700000
2012-01-01	63.1083333333333
2013-01-01	64.6333333333333
2014-01-01	65.1333333333334
2015-01-01	66.2416666666666
2016-01-01	66.5416666666667
2017-01-01	66.7500000000000